We read on the startup:
A new virtual-machine, known as “Cog”, is about to be released for Squeak. It’s a complete rewrite from the ground-up, employing a Context-to-Stack mapping design onto which a JIT compiler for Intel-compatible hardware results in, roughly, a 3X, across-the-board performance improvement. Specific Benchmarks vary much more widely (from 1x to 5x, with some people claiming 10x for specifics.
Plus, latest squeak feature a Cleaned-up code base, refactoring and unification of Smalltalk and SmalltalkImage globals and much more! Give it a try!